Abstract A Spanish adaptation of the Experiences in Close Relationships (ECR) measure of the 2 dimensions of adult attachment (K. A. Brennan, C. L. Clark, & P. R. Shaver, 1998) was created using a back‐translation procedure. Called the ECR‐S, the new scale displays the same 2‐factor structure as the English‐language ECR in both university and community samples and is reliable in both the internal consistency and the temporal stability senses. In a sample of married and cohabiting couples, the 2 subscales of the ECR‐S, anxiety and avoidance, are orthogonal and correlate with other theoretically appropriate variables (scores on K. Bartholomew and L. M. Horowitz’s, 1991, measure of adult attachment style, relationship status, and various dimensions of love and couple satisfaction). Cross‐cultural differences between American and Spanish results are briefly discussed.